The south literally tried to secede over exactly that state of affairs, starting the USA civil war. Not particularly controversial...
The north got rich off factories and wage earning labour. To equate the wealth of America to the south is a falsehood. And not a helpful one. It misleads you into missing the travesty of slavery: it did not build a nation. It gave leisure to a couple lucky families at the expense of hundreds per plantation.
The industry and wage earning of the north is what built America.
But the textile mills in the Northern states also got their cotton predominantly from the South. Not to mention the tobacco, rice, etc.
uhhh... who is gonna tell him? that those industries in the north imported goods from the south.
Americas racism was primarily southerners being racist. It took white liberals to liberate everyone else, and we have to thank and celebrate the white liberal, not shit on them yet again.
Here is the list of GPD countries in 1861, before the start of civil war:
1 - China - $199.6 billion
2 - India - $125.7 billion
3 - United Kingdom - $85.8 billion
4 - France - $72.3 billion
5 - Germany (Prussia and other states) - $52.4 billion
6 - Russian Empire - $49.6 billion
7 - United States - $44.2 billion
8 - Japan - $33.0 billion
9 - Austria-Hungary - $30.1 billion
10 - Ottoman Empire - $17.5 billion
Source: https://www.oecd-ilibrary.org/development/the-world-economy_...